Was the proposed 15-inch/45 for the King George V class also intended to fit the Queen Elizabeth class?
Short answerThat seems very likely because the change from the older 15-inch/42 appears small enough to make a retrofit practical.
NotesThere are strong indications that the newer 15-inch/45 was designed with wider fleet use in mind. The dimensional and installation tradeoff from the existing 15-inch/42 appears limited enough for Queen Elizabeth-class conversion. That possibility would have tied new construction to the modernization of the Royal Navy's most valuable older battleships. Common caliber, mount compatibility, and refit planning can multiply the value of a gun program.